.nav-list {
  position: relative;
  float: left;
  width: 90px;
  height: 100%;
}
.nav-list ul li a {
  display: block;
  width: 90px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  color: #333;
  background: #eee;
}
.nav-list ul .current a {
  border-right: none;
  background-color: #fff;
}
.content {
  height: 100%;
  overflow: hidden;
}
.content ul li {
  float: left;
  width: 33.33%;
  text-align: center;
}
.content ul li img {
  width: 80%;
}
